Shaft-coupling



(N o'Model.)

C. E. -MARSTON y'Shaft Coupling.

No. 238,602. Patented March A8, 1881.,

' INVENTOR:

ATTORNEYS.

llNrTnn STATES .ATENT FFICF..

SHAFT-COUPLING SPECIFICATION forming part of Letters Patent No. 238,602,dated March 8, 1881.

Application filed December 20, 1880. (No model.)

To all whom t may concern:

Be it known that I, CHARLES E. MARSTON, of Dover, in the county ofStrafford and State of New Hampshire, have invent-ed a new and ImprovedShaft-Couplin g, of which the following is a full, clear, and exactdescription.

The object of this invention is to provide a more simple and securedevice for coupling line-shafting.

The invention consists of two semi-cylindrical blocks longitudinallygrooved in their flat faces, and having midway of their groovesrectangular or ilat seats that serve to hold the correspondinglyflattened and shouldered ends of the coupled shafts 5 and it consists,further, in combination with the blocks, of interiorlytaperinglocking-rings that fit over the correspondingly-tapering ends of theblocks to hold the latter together, and are held and adjusted in placeby screws or other suitable device. rlhe coupling may be provided with akey or keys, or may be applied without one.

Figure l is a cross-sectional elevation of the coupling without a key inposition on line w x, Fig. 4. Fig. 2 is a cross-sectional elevation online Fig. 4, of the coupling in position with two keys. Fig. 3 is across-sectional elevation on line .fr a', Fig. 4, of the coupling inposition with four keys. Fig. 4 is a longitudinal sectional elevation ofthe coupling withone key in position on line z z, Fig. 6. Fig. 5 is alongitudinal sectional elevation of the coupling in position on line yy, Figs. 2 and 6. Fig. 6 is an end elevation of the same.

Similar letters of reference indicate corresponding parts.

In the drawings, A A2 represent respectively the two semi-cylindricalblocks forming the body of the coupling A. Each block A' A2 has acentral longitudinal semicircular groove, a, formed in its flat face,about midway the length of which is a rectangular seat, b, raised abovethe general level of the groove a., so as to gripe the correspondinglattened and shouldered ends of the shafts C and prevent said shafts Cfrom turning and boring the coupling A. rlhese seats b may be anintegral part of the said coupling A, or be inserted in correspondingrecesses made therein, and said seats b may have one or more keyways, c,cut in their edges to hold a key or keys, d, as shown or indicatedinvFigs. 2, 3, 4,

and 5, respectively, to assist in more firmly securing the shafts C, ormay be without keyway or key, as shown in Fig. l. The block A is alsoprovided along the edges of its dat face with ribsf, that are designedto t into corresponding grooves or depressions g along the edges oftheblock A2, whereby the said blocks A A2 are prevented, when applied as acoupling, from moving apart laterally or twisting on the plane of theirflat faces. On the outside the end of each block A A2 is turned down toa taper, as shown at h, thereby forming, at a short distance from theends, the shoulders m, against which the locking-rings B may be set whenin position. The lockingrings B have an annular lip, b', on the inneredge to hold the sections together, are beveled interiorly, as shown atn, to correspond with the end bevels, h, of the blocks A A2, arecentrally bored, as shown at o, for the passage of the shafts C throughthem, and are held in place 011 the ends of the coupling A by means ofscrew-bolts p p, that enter through them' into the blocks A A2, as shownin Figs. 4and 6. Around the peripheries of the rings B are flanges q,projecting above the heads of the screw-bolts p p, and serving toprotect them. Onthe shanks, and beneath the heads of said bolts p p, arecushions or washers s, of leather or other elastic substance, to preventsaid bolts p p from working loose because of any jarring that maybecommunicated through theshaftC.

This coupling is strong and of cheap construction, can be easily fittedin place, and can be used as well as a pulley.

In order to apply this coupling A the ends of the shafts C must beljattened on opposite faces, as shown at r, and butted together; thenthe blocks Al A2 are applied in the manner indicated, so that theflattened ends of the shafts (l shall be between the seats b and theshoulders t of the shafts C, abutting against the ends of the seats b,-then the rings B are tted on the ends of the blocks A A2, and secured inplace by the boltspp, which may be screwed up as tightly as may bedesired.

Having thus described my invention, I claim as new and desire to secureby Letters Pati entl. In a shaft-coupling, the combination, withsections Al A2, having the shoulders m, of the end rings, B B, iittingup to said shoulders IOO and having :L lip that overlaps them, es detheshafts @,having flattened ends 1', substanseribed. tially as hereinshown and described, whereby 1c 2. In a shaft-coupling, thecombinetioinwith said shafts are prevented from turning in the thegrooved blocks A A2, provided With seats coupling, as set forth.

b, having keywey c, of the key d, substantially CHARLES E. MARSTON. asand for the purpose described. Witnesses:

3. The combination, with the interiorly- CHARLES W. HASLER,

grooved coupling A, provided with seats b, of l MICHAEL QUINLAN.

